Lexus ES manuals

Lexus ES: Lost Communication with Battery Monitor Module Missing Message (P162B87)

Lexus ES (XZ10) Service Manual / Power Source & Network / A25a-fxs (battery / Charging) / Charging System / Lost Communication with Battery Monitor Module Missing Message (P162B87)

DESCRIPTION

The hybrid vehicle control ECU communicates with the battery state sensor assembly via LIN communication. If a LIN communication error is detected, the hybrid vehicle control ECU stores this DTC.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Warning Indicate

Memory

P162B87

Lost Communication with Battery Monitor Module Missing Message

Battery state sensor assembly or hybrid vehicle control ECU communication stops for approximately 17 minutes or more with the power switch on (IG).

(1 trip detection logic)

  • Wire harness or connector
  • Battery state sensor assembly
  • Hybrid vehicle control ECU

Charge warning is not displayed

DTC stored

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • Inspect the fuses for circuits related to this system before performing the following procedure.
  • Make sure to perform the necessary procedures (adjustment, calibration, initialization, or registration) after parts related to the charging system have been removed/installed or replaced.

    Click here

PROCEDURE

1.

CHECK BATTERY STATE SENSOR ASSEMBLY

(a) Check installation condition of the battery state sensor assembly.

NG

INSTALL THE BATTERY STATE SENSOR ASSEMBLY CORRECTLY

OK

2.

CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)

(a) Check that the battery state sensor assembly connector is securely connected.

OK:

The connector is securely connected.

(b) Disconnect the R6 battery state sensor assembly connector.

(c) Check the connector case and terminals for deformation or corrosion.

OK:

No deformation or corrosion.

(d) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

R6-1 (+B) - Body ground

Always

11 to 14 V

*a

Front view of wire harness connector

(to Battery State Sensor Assembly)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (AUXILIARY BATTERY - BATTERY STATE SENSOR ASSEMBLY)

OK

3.

CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - BATTERY STATE SENSOR ASSEMBLY)

(a) Disconnect the A32 hybrid vehicle control ECU connector.

(b) Disconnect the R6 battery state sensor assembly connector.

(c) Disconnect the C95 compressor with motor assembly connector.

(d) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

A32-17 (LIN3) - R6-2 (LIN)

Always

Below 1 Ω

R6-2 (LIN), A32-17 (LIN3) or C95-3 (DOUT) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4.

CLEAR DTCS

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

(e) Check for DTCs, and note down any DTCs that are output.

Powertrain > Hybrid Control > Trouble Codes

(f) Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

(g) Clear the DTCs.

Powertrain > Hybrid Control > Clear DTCs

(h) Turn the power switch off and wait for at least 30 seconds or more.

NEXT

5.

CLEAR DTCS (AIR CONDITIONING SYSTEM)

(a) Enter the following menus: Body Electrical / Air Conditioner / Trouble Codes.

(b) Check for DTCs, and note down any DTCs that are output.

Body Electrical > Air Conditioner > Trouble Codes

(c) Enter the following menus: Body Electrical / Air Conditioner / Trouble Codes.

(d) Clear the DTCs.

Body Electrical > Air Conditioner > Clear DTCs

(e) Turn the power switch off and wait for at least 30 seconds or more.

NEXT

6.

CHECK FOR DTCS

(a) Turn the power switch on (READY) and wait for 17 minutes or more.

(b) Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

(c) Check for DTCs.

Powertrain > Hybrid Control > Trouble Codes

Result

Proceed to

DTC P162B87 is output.

A

DTCs are not output.

B

B

CHECK FOR INTERMITTENT PROBLEMS

A

7.

CHECK FOR DTCS (AIR CONDITIONING SYSTEM)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Air Conditioner / Trouble Codes.

(e) Check for DTCs when the following conditions are met.

Body Electrical > Air Conditioner > Trouble Codes

Result

Proceed to

DTC B1498 is output.

A

DTCs are not output.

B

A

REPLACE HYBRID VEHICLE CONTROL ECU

B

REPLACE BATTERY STATE SENSOR ASSEMBLY

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